Satellite Navigation - an overview | ScienceDirect Topics
3.2 Global Navigation Satellite Systems. More popularly known as satnav or satellite navigation, the provision of precise location and timing services via satellites has become a mainstay of modern societies over the past 20 years. Its importance today is shown by the provision of at least four different constellations of Global Navigation ...
Satellite Navigation Systems - an overview - ScienceDirect
Other satellite navigation systems, which are partially operated or under construction, are Russian GLONASS (Global Navigation Satellite System) program and European Galileo program. GLONASS is Russia's version of GPS. The first GLONASS satellite was launched in 1982, but the system remains partially operational due to political and economic ...
Autonomous navigation for deep space small satellites: Scientific …
Apr 1, 2022 · The Linked, Autonomous, Interplanetary Satellite Orbit Navigation (LiAISON) method [110] is based on inter-satellite radiometric measurements to estimate spacecraft absolute states when at least one of the orbits has a unique size, shape, and orientation. This can be found in several deep space cases such as around asteroids or at libration points.
Satellite navigation signal quality monitoring algorithm based on …
Jun 25, 2024 · The service performance of Global Navigation Satellite System (GNSS) is related to the quality of satellite navigation signals (Zhang et al., 2019). High-quality satellite navigation signals improve service availability and provide users with reliable and accurate location information ( Jin and Su, 2020 , Yang et al., 2024 ).
GREAT: A scientific software platform for satellite geodesy and …
Aug 15, 2024 · The software platform named GNSS + REsearch, Application and Teaching (GREAT) has been designed and developed by Wuhan University for satellite geodesy and multi-source fusion navigation. GREAT is a comprehensive software platform based on C++ language, with modular structure, cross-platform capabilities and efficient performance.
Satellite navigation by stellar refraction - ScienceDirect
Oct 1, 1988 · The orbital elements are propagated Satellite navigation by stellar refraction 1075 8oo iv. 0 n,,. e,,. 7OO tlJ z <UJ 600 0 500 o ~ 400 Z "~ 300 j x X N=50 I I I I I I 200 250 300 350 400 450 o',.
Satellite navigation signal quality monitoring algorithm based on …
Jun 25, 2024 · The service performance of Global Navigation Satellite System (GNSS) is related to the quality of satellite navigation signals (Zhang et al., 2019). High-quality satellite navigation signals improve service availability and provide users with reliable and accurate location information (Jin and Su, 2020, Yang et al., 2024).
A starlight refraction scheme with single star sensor used in ...
Mar 1, 2014 · For LEO satellite navigation, the Earth's horizon is an important reference. According to their mode of measurement acquisition, satellite celestial navigation methods fall into two main categories: the direct measuring method and the indirect measuring method by stellar refraction [4]. The first one has a problem that the high precision star ...
Autonomous satellite navigation using starlight refraction angle ...
May 1, 2013 · Autonomous satellite navigation is the ability to determine satellite position and velocity in real time without the assistance of external support (Collins and Conger, 1994). On-board autonomous navigation can provide a significant reduction in ground operating costs and great improvement in satellite survivability (Fesq et al., 1996).
Advances in intelligent and autonomous navigation systems for …
May 1, 2020 · The Global Navigation Satellite System (GNSS) is typically the sole source of absolute positioning information in most sUAS architectures, owing primarily to the proliferation of small, low-cost receivers in the market, the addition of new satellites to existing constellations and the emergence of several new constellations.